Equations Flashcards by Josh Lee

Q

Weight

A

Mass x gravitational field strength

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Q

Work done

A

Force x distance

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Q

Force (spring)

A

Spring constant x extension

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Q

Moment(Nm)

A

Force x distance

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Q

Pressure(Pa)

A

Force/area

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Q

Speed

A

Distance/time

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Q

Accelerations

A

Change in velocity/time

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Q

Force

A

Mass x acceleration

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Q

Momentum

A

Mass x velocity

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Q

Kinetic energy

A

0.5 x mass x velocity^2

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Q

GPE

A

Mass x gravitational field strength x height

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Q

Power (energy)

A

(Energy transferred/time) x 100 to get percentage

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Q

Power (work done)

A

Work done/time

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Q

Efficiency

A

Useful energy output/total input energy

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Q

Wave speed(m/s)

A

Frequency(Hz) x Wavelength(m)

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Q

Density (kg/m^3)

A

Mass/volume

Q

Pressure (in liquid) (Pa)

A

Height x gravitational field strength x mass

Q

Acceleration (equation including distance)

A

(Final velocity)^2 - (Initial velocity)^2 = 2 x distance x accleration

Q

Force (includes time)

A

Change in momentum / time

Q

Elastic potential energy (j)

A

0.5 x spring constant x (extension)^2

Q

Specific heat capacity (j/kg °C)

A

Change in thermal energy = mass x specific heat capacity x temperature change

Q

Period

A

1/frequency

Q

Magnification

A

Image height / Real height

Q

Specific latent heat (j/kg)

A

Energy = mass x specific latent heat

Q

Gases (with a constant)

A

Pressure x volume = constant